Yuuto Kiba

Yuuto Kiba is one of the male protagonists of High School DxD. He is a third-year high school student at Kuoh Academy in Class 3B and the school's pretty boy who is adored by many female students and hated by other male students. He is Rias' Knight and a member of the Occult Research Club.

Personality
Yuuto is an overall upbeat person and cares deeply for his comrades. He's also a very polite individual when it comes to his manner and personality, even considering Issei's initial dislike towards him. As a Knight, he has pride, chivalry, dignity, and honor befitting one, and is shown to enjoy fighting fellow swordsman like Karlamine.

Initially, he had a deep hatred towards the Holy Swords or its wielders. But the efforts of the Occult Research Club members during Volume 3, and the souls of his deceased friends, who died earlier being victims of the Holy Sword Project, helped him overcome his drive for vengeance, making him more acceptable of the Holy Swords.

Kiba also considers and respects his rivalry with Issei deeply, going so far as to note that he does one day wish to fight him fair and square. But at the same time, he also displays a deep concern towards him, even as far as avenging Issei's death during Volume 12.

Kiba is surprisingly a bit lecherous himself, as commented by Issei during the course of both the anime or the novels.